Mario Williams has been one of the main reasons the Bills' defense has played better as of late.

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This is the time of year in the NFL when teams who don't play in domed stadiums, and call the Northeast and Midwest home, need to be playing their best defense in order to succeed.

Barring a miracle, it's now too late to make a difference in terms of their chances of making the playoffs, but the Buffalo Bills have been doing just that the past few weeks.

"I feel like our defense is getting better and has become more consistent," coach Chan Gailey said. "There is a trust factor amongst your defense that if everybody just does their job, they will be fine defensively. That's where we have gotten to at this ...